What I've noticed over the last month or so is the room search defaults to the Fall offer. Don't know if that is just me or happening for everyone.
In order to see availability at all rates, you need to click on one of the results, change it to just Room, then click on Change and switch the drop-down resort selector to All Resorts. Then you will get everything available.
I just did a search for Nov 28-Dec 1, got 2 results. Clicked on one of them, did the process I described above, then got a lot more availability. Cheapest was AoA for $215/night.
I have a reservation for Nov 23-28 at POFQ (rack rate). In general, Disney rooms for Thanksgiving week have been rapidly vanishing starting about Sep 15 or so. I had been considering a preferred or tower room at Coronado using the Fall offer, but I spent too long in the planning and analysis phase and all of a sudden rooms started disappearing on me, so FQ became the best bang for my buck. (Plus, I like FQ...)
As another aside, Undercover Tourist Disney resort inventory for Thanksgiving week went completely sold out a week or so ago.